Product Information:
The concept and Idea for this Hop Up unit is great. Building it was fairly simple, just make sure you have some grease on hand for the spacer. The bucking I found was too big for the chamber itself and the metal is really cheap. The front end broke during shipping which didn't surprise me once I notice how this and soft the metal was. I did love how it kept the bbs in the chamber. Little disappointed on the quality.

Product Information:
I bought this product when I was relatively new to airsoft. I did a ton of research and looked at a bunch of forums figuring out how I could increase range accuracy and fps because i like playing the DMR role. Little did I know I had no idea how to put this hop unit together or even take apart my gun. Thankfully the Manuel that came with this product was simple and easy to understand. Putting together the hop up unit was simple the only challenge I ran into was getting the nub to stick I didn't have any grease at my house so I had to go out and buy some which wasn't too expensive at all. Once I got the unit together it was an easy drop in to my G&G Raider... With my inexperience I didn't see too many results at first... But that was because my nub was crooked and my bucking wasn't installed correctly.. Yeah I was such a noob at the time... When I actually figured out the problems and became more intelligent with airsoft parts this unit was awesome. It has instantly increased accuracy and improved range. BB's were finally shooting straight no flyers!! Another huge positive was the wheel. It's very easy to move and since it's larger it's even easier to move with gloves on. All in all this unit has been everything I've wanted and I am going to install it into my new airsoft gi custom DMR.. Pairing this with a magic box miracle barrel and I'm going to have one accurate rifle.

Pros:
Metal!
Great deal for what you get in this package
Tracer unit attachment.. I don't use a tracer unit but it's still really nice
Accuracy increase
Range improvement
Installation easy if you know what your doing
Another great product from mad bull
Only lose one BB instead of 5 when you take the mag out

Cons:
None really
Harder for me to put together but thats because I had no idea what I was doing at the time
This is an awesome product and I suggest you buy one!

Product Information:
This is a breeze to install. This was my first hop up I have bought as well as putting it all together. I had little trouble getting it together but I did have some challenges. The nub will need some grease to stick to the piece it goes on. Mine fell out after install but I managed to roll it in and push it in place with tweezers. I found it will not fall out if you leave the dial all the way up (obvious but I had great faith in my grease...) and will make for easier barrel installation. My bucking I received was too big and couldn't handle much and so it tore easily. Luckily I had bought one that was shorter and it worked out just fine. Besides those two things it took about 20 minutes of trial and error before I got it all figured out.

I gave it a four star because of the bucking and the fact my madbull tbb did not get along with it despite being from the same company.

Pros:
Easy install
Works great (so far, I'm still in trial mode)
Metal (I had to use some force with my hammer to get it in my upper receiver)
Works in my G&G M4
I can see some increased range and accuracy (I have a madbull tbb 6.03)
Feeds good so far.

Cons:
Terrible bucking. You would think buying two products from the same company would work great together but madbull just kicked that to the curb.
The nub can be a pain but I only had to threaten it one time before I got it.

Product Information:
Like any other Madbull product this is outstanding! This full metal hop up unit increases your accuracy by far and your range quite a bit. This also is a quick assemble hop up and comes with a blue bucking. I like this mainly because it is unique. Most m4 hop ups have that small wheel on the side of the hop up connecting to those other like 2 or 3 gears, well this has the wheel in the back and you can install Madbulls tracer system! A big thing for me was that when you take your mag out of your gun, instead of those 4 to 5 bbs coming out, only 1 does. The rest stay in the hop up but wont shoot out unless a mag is in. This over time will save you bbs and money! Only reason why I gave it a 4/5 is because the bucking it comes with wont fit into the hop up correctly even on Madbull's own 6.03 barrel.

Product Information:
This hopup chamber is wonderful solidly built amazing durability and the bb blocking thing really works! does not affect feeding at all actually this hopup feeds better than any hopup ive ever owned MUST HAVE FOR ANY PLAYER i use this with a REAPS bucking and a madbull ver 2 TBB 6.03 range _75+ yards accurately

Pros:
SOOOO MUCHH METAL
No parts can actually break or fail
hold hop during firing does not (unwind)
comes with a decent bucking
BOTTOM LINE
GET IT!

Cons:
its a little spendy same basic design of an ICS or a stock ARES but this ones better( metal/Orings)
does not include the LED tracer module (i knew this when i bought it would have spent an extra say 15 to get them together...)
LED module is way to over priced (my opinion)

Product Information:
I must say, this is one of the best hop-ups I have ever owned, it works incredibly well, and I would highly recommend it to anyone looking for a new ho-up. First off, it's very nice in the fact that the adjustment wheel is very large and easy to adjust, and no future adjusment required unless to personal preference, and second, it will fit behind the bolt of the m4. To put it ogether is easy on the paper, but the bucking is very hard to get on the barrel, and is a bit too long, like 2mm too long, and the nub is even harder to get in, but once it is in, it works very nicely.

Pros:
few parts for putting together
big adjustment wheel
added 20ft range to my gun
easy to adjust with gloves on

Cons:
bucking is a tad too long, but no bigproblem
hard to get the nub in, but other than that, good hop-up

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